The Administrative Order on Consent (AOC) requires the Navy to research and evaluate structural upgrades to the existing tanks at Red Hill. Currently the tanks are constructed of concrete with quarter-inch steel plates forming a liner around the barrel and top of the tanks, and half-inch steel plates lining the bottom of the tanks. The concrete varies from 2 ½ to 4 feet thick, and the entire tank sits atop a concrete foundation that is 20 feet thick.

The Navy’s Tank Upgrade Alternatives Report, submitted on December 9, 2017, summarizes dozens of technologies that were considered to improve the storage tanks and provides detailed conceptual design information for six upgrade options still being considered. The six final options under evaluation consist of three single-wall alternatives and three double-wall alternatives. This report does not recommend a specific tank upgrade alternative. EPA, the Hawaii Department of Health, the Navy, and Defense Logistics Agency will use its information, along with community input and other work produced under the agreement, in selecting the final upgrade alternative. A redacted version of the report is available for viewing below. Due to Federal contracting regulations, some information, such as the cost of the upgrade options, cannot be publicly released. On May 21, 2018, EPA and the Hawaii Department of Health approved the Tank Upgrade Alternatives Report.

The Navy and Defense Logistics Agency have also developed and submitted the Tank Upgrade Alternatives Decision Process document, which describes the decision-making process and identifies the information sources the Navy and the Defense Logistics Agency will use to upgrade the tanks in accordance with Section 3 of the Administrative Order on Consent Statement of Work (AOC/SOW). This Decision Process Document was submitted to the Regulatory Agencies on September 29, 2017 and is available for viewing below.

Documents

• EPA and DOH Approval of Tank Upgrades Alternatives Report (PDF)(5 pp, 244 K, 5/21/2018)
  Letter with enclosures from EPA and DOH approving the Navy and Defense Logistics Agency’s tank upgrade study.
• Red Hill Tank Upgrade Alternatives Report [redacted] - 8 December 2017 (PDF)(459 pp, 14 MB, 12/08/2017)
  Administrative Order on Consent Statement of Work Section 3.3 Tank Upgrade Alternatives Report, Red Hill Bulk Fuel Storage Facility, Joint Base Pearl Harbor-Hickam, Oahu, Hawaii.
• Tank Upgrade Alternative Decision Process - 29 September 2017 (PDF)(13 pp, 351 K, 09/29/2017)
  This Navy document describes the decision making process and identifies the information sources the Navy and the Defense Logistics Agency will use to select the Best Available Practicable Technology (BAPT) for a Tank Upgrade Alternative (TUA) in accordance with Section 3 of the Administrative Order on Consent Statement of Work (AOC/SOW) dated 28 September 2015.